Intra-crater structure in Hellas Basin

This image from an observation by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter covers a small portion of the northwest quadrant of Hellas Basin, or Hellas Planitia, on southern Mars. With a diameter of about 2,200 kilometers and a depth reaching the lowest elevations on Mars, Hellas is one of the largest impact craters in the solar system.